SEO Checker

Generate SEO audits for any HTML webpage.

Submit a single webpage URL for auditing. Submit a sitemap URL and parse URLs within that sitemap. Submit multiple URLs to be audited at once.
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Free SEO Audit Tool - Comprehensive Website Analysis in Seconds | SEO Tools

🚀 Free SEO Audit Tool

Comprehensive website analysis with 43+ professional tests. Get instant insights, actionable recommendations, and AI-powered summaries to boost your search rankings.

Analyze Your Website Now

Enter your URL above to receive a detailed SEO audit in seconds

Lightning Fast
Results in under 1 second
📊
43+ Tests
Comprehensive analysis
🤖
AI Insights
Smart recommendations
🎯
Actionable Tips
Clear improvement steps

Why a Comprehensive SEO Audit is Crucial

In today's competitive digital landscape, a thorough SEO audit is not just recommended—it's essential. With search algorithms constantly evolving and user expectations rising, understanding your website's strengths and weaknesses is the foundation of any successful SEO strategy. Our comprehensive SEO audit tool analyzes 43+ critical ranking factors to give you a complete picture of your site's search engine optimization health.

43+ SEO Tests
<1s Analysis Time
100% Free to Start
24/7 Availability

Whether you're a small business owner, digital marketer, or SEO professional, regular audits help you identify technical issues, content gaps, and optimization opportunities before they impact your rankings. Our tool provides instant, actionable insights that help you prioritize fixes and track improvements over time. With AI-powered summaries, you'll understand complex SEO issues in plain language and know exactly what to fix first.

Key Pillars of a 2025 SEO Audit

Modern SEO audits go beyond basic keyword checks. Our comprehensive analysis covers six critical pillars that search engines use to evaluate and rank websites. Each pillar is tested with multiple checkpoints to ensure nothing is overlooked.

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Basic Document Setup

The foundation of proper HTML structure and browser compatibility.

  • Doctype declaration validation
  • Language attribute specification
  • Meta charset configuration (UTF-8)
  • Responsive viewport settings
  • Favicon presence and format
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On-Page SEO

Critical elements that directly impact search visibility and rankings.

  • Title tag optimization (50-60 characters)
  • Meta description quality (120-160 characters)
  • H1 tag presence and uniqueness
  • Robots meta and header tags
  • Canonical URL implementation
  • SEO-friendly URL structure
  • Open Graph social media tags
  • Schema.org structured data
  • Proper heading hierarchy (H2-H6)
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Content Quality & Markup

Content depth, quality signals, and clean code practices.

  • Word count analysis (minimum 300-500 words)
  • Top keyword usage identification
  • Deprecated HTML tag detection
  • Inline CSS usage check
  • Plaintext email exposure
  • Text-to-HTML ratio (target >15%)
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Media & Image Optimization

Visual content optimization for speed and accessibility.

  • Modern image format usage (WebP, AVIF, SVG)
  • Alt attribute completeness
  • Lazy loading implementation
  • Image compression analysis
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Technical & Performance

Backend configuration and loading speed optimization.

  • robots.txt validation
  • Custom 404 page configuration
  • Server header security
  • Compression algorithms (Brotli, Gzip)
  • Response time measurement
  • Page size optimization (target <150 KB)
  • DOM size efficiency
  • JavaScript deferment
  • HTTP request count
  • HTTP/2 protocol support
  • HTTPS security
  • SSL certificate validity
  • Strict Transport Security (HSTS)
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Link Architecture

Internal structure and external link safety.

  • External link security (noopener, noreferrer)
  • Internal linking structure
  • Social media link presence
  • Broken link detection

Advanced SEO Audit Strategies for 2025

As search algorithms become more sophisticated, your SEO audit strategy must evolve. Here are the advanced techniques that separate top-ranking websites from the competition.

🤖 AI-Powered Analysis

Our tool leverages artificial intelligence to provide context-aware recommendations. Instead of just listing issues, the AI summary explains the impact of each problem on your specific website and prioritizes fixes based on potential ranking improvements. This means you spend less time interpreting data and more time implementing changes that matter.

📊 Comparative Benchmarking

Your SEO score isn't evaluated in isolation. Our system compares your performance against the global average of audited websites, giving you industry context. You'll see exactly where you stand—whether your score of 92/100 is above or below the average 91, and by how much. This competitive intelligence helps you set realistic goals and measure real progress.

⚡ Performance-First Approach

Page speed is a confirmed ranking factor for Google, and our audit places heavy emphasis on performance metrics. We measure response time in milliseconds, analyze page size, evaluate DOM complexity, and check for render-blocking resources. With Core Web Vitals becoming increasingly important, understanding and optimizing these metrics is non-negotiable for top rankings in 2025.

🔒 Security & Trust Signals

Search engines prioritize secure websites. Our audit verifies HTTPS implementation, SSL certificate validity, and checks for security vulnerabilities like exposed server headers and plaintext email addresses. These trust signals affect both your rankings and user confidence—a critical combination for conversion optimization.

📱 Mobile-First Validation

With Google's mobile-first indexing, your mobile experience is your primary ranking signal. Our audit validates viewport configuration, responsive design elements, and mobile-specific performance metrics to ensure your site meets modern mobile standards.

🔄 Automated Monitoring

SEO isn't a one-time task—it's an ongoing process. Professional plan users can set up automated audits that run on schedule, with multiple notification handlers alerting you to new issues immediately. This proactive approach prevents ranking drops before they happen and helps you maintain consistent search visibility.

Common Rejection Reasons in Organic Search Ranking

Understanding why websites fail to rank is just as important as knowing what helps them succeed. Here are the most common issues our audit tool identifies that can hurt your search visibility.

🚫 Poor Text-to-HTML Ratio

When your page has too much code and too little content, search engines struggle to understand your page's purpose. A ratio below 15% suggests excessive code bloat or thin content. This was one of the issues found in the example audit—the site had only 9% text-to-HTML ratio. Solution: Increase valuable content, minimize inline styles, and clean up unnecessary HTML.

🚫 Missing or Poor Alt Attributes

Images without alt text create accessibility barriers and miss valuable SEO opportunities. Search engines can't "see" images—they rely on alt attributes to understand visual content. Every image on your site should have descriptive, keyword-relevant alt text that adds value for both users and search engines.

🚫 Oversized Page Resources

Pages larger than 150 KB load slowly, frustrate users, and receive ranking penalties. The example audit showed a page size of 180.8 KB—too large for optimal performance. Compress images, minify code, enable server compression, and consider lazy loading for below-the-fold content to reduce page weight.

🚫 No Server Compression

Serving uncompressed resources wastes bandwidth and slows load times. Modern compression algorithms like Brotli or Gzip can reduce file sizes by 70-90% without quality loss. The example audit found no compression enabled—a quick server configuration fix that dramatically improves performance.

🚫 Exposed Server Information

Public server headers reveal technical details that attackers can exploit to find vulnerabilities. Removing or obfuscating the server HTTP header improves security—an increasingly important ranking signal as Google prioritizes user safety.

🚫 Render-Blocking JavaScript

JavaScript files that aren't deferred block page rendering, creating frustrating delays for users. Adding the "defer" attribute to script tags allows HTML to load first, dramatically improving perceived performance and Core Web Vitals scores.

🚫 Plaintext Email Addresses

Email addresses visible in your HTML are harvested by spam bots, leading to increased spam and potential security issues. Use contact forms, JavaScript obfuscation, or CSS techniques to display emails without exposing them in plaintext.

🚫 Missing Lazy Loading

Loading all images immediately wastes resources on content users may never see. Implementing lazy loading with the loading="lazy" attribute ensures below-the-fold images only load when needed, improving initial load time and bandwidth efficiency.

SEO Best Practices in 2025

The SEO landscape continues to evolve. Here are the proven best practices that drive results in 2025, all verified by our comprehensive audit tool.

  • Prioritize Core Web Vitals: Focus on Largest Contentful Paint (LCP), First Input Delay (FID), and Cumulative Layout Shift (CLS). These user experience metrics are confirmed ranking factors. Aim for response times under 200ms, optimize images, and eliminate layout shifts.
  • Implement Comprehensive Structured Data: Schema.org markup helps search engines understand your content and can earn rich snippets in search results. Add structured data for articles, products, reviews, FAQs, breadcrumbs, and organization information where applicable.
  • Optimize for Entity-Based Search: Modern search engines understand entities (people, places, things) and their relationships. Create content that clearly establishes your topical authority and connects related concepts through internal linking and contextual content.
  • Create Long-Form, Comprehensive Content: Pages with 1,000-2,500+ words consistently outrank shorter content for competitive queries. Depth signals expertise and provides more opportunities to satisfy user intent and include relevant keywords naturally.
  • Perfect Your Title and Meta Description: Your title should be 50-60 characters with your primary keyword near the beginning. Meta descriptions should be 120-160 characters, compelling, and include a clear call-to-action. These elements dramatically affect click-through rates from search results.
  • Build a Strong Internal Linking Structure: Strategic internal links distribute page authority, help search engines discover content, and guide users through your site. Use descriptive anchor text and ensure every page is accessible within 3 clicks from the homepage.
  • Implement Security Best Practices: HTTPS is mandatory, not optional. Ensure your SSL certificate is valid, implement HSTS headers, remove server fingerprints, and protect user data. Security breaches can result in immediate ranking penalties and lost trust.
  • Optimize Images with Modern Formats: Use WebP or AVIF formats for significant file size reductions (25-35% smaller than JPEG) without quality loss. Every image should have descriptive alt text, appropriate dimensions, and implement lazy loading for below-the-fold images.
  • Maintain Clean, Semantic HTML: Avoid deprecated tags, minimize inline CSS, use proper heading hierarchy (only one H1, logical H2-H6 structure), and keep your text-to-HTML ratio above 15%. Clean code is faster to parse and easier for search engines to understand.
  • Monitor and Fix Issues Continuously: Set up automated audits to catch problems early. Regular monitoring helps you identify issues from updates, new content, or technical changes before they impact rankings. The best SEO strategy is proactive, not reactive.
  • Optimize for Featured Snippets: Structure content with clear questions and concise answers. Use lists, tables, and definition formats that Google commonly pulls into position zero. Featured snippets can dramatically increase visibility and click-through rates.
  • Ensure Mobile Excellence: With mobile-first indexing, your mobile experience determines your rankings. Test on actual devices, ensure touch targets are appropriately sized, minimize pop-ups, and optimize for smaller screens. Mobile performance is desktop performance—there's no secondary priority anymore.

Frequently Asked Questions

What is an SEO audit and why do I need one?
An SEO audit is a comprehensive analysis of your website's optimization for search engines. It examines technical factors, content quality, on-page elements, performance metrics, and more. You need regular audits to identify issues preventing higher rankings, find optimization opportunities, benchmark against competitors, and track improvements over time. Think of it as a health checkup for your website's search visibility.
How many tests does your SEO audit tool run?
Our comprehensive audit runs 43+ individual tests covering six major categories: Basic Document Setup (5 tests), On-Page SEO (11 tests), Content Quality & Markup (6 tests), Media & Image Optimization (3 tests), Technical & Performance Factors (13 tests), and Links (3 tests). This thorough analysis ensures no critical issue goes unnoticed.
How long does an SEO audit take?
Our tool delivers results in under 1 second in most cases. The example audit showed a response time of just 103.348 milliseconds—a fraction of a second. You'll receive your comprehensive score, issue breakdown, passed tests, and AI summary almost instantly, so you can start optimizing immediately.
What does the SEO score mean?
Your SEO score is calculated from 0-100 based on the 43+ tests we run. Each test has a weighted importance, with critical issues like HTTPS, mobile responsiveness, and title tags carrying more weight than minor optimizations. A score of 90+ is excellent, 70-89 is good with room for improvement, 50-69 needs attention, and below 50 indicates serious issues requiring immediate fixes. We also show how your score compares to the global average.
What's included in the AI summary?
The AI-powered summary analyzes your audit results and provides context-aware insights in plain language. It highlights your strengths, explains critical issues and their impact, prioritizes fixes based on potential ranking improvements, and offers specific, actionable recommendations. The AI understands your unique situation—it doesn't just list problems, it explains why they matter and what to do first.
Can I audit multiple websites?
Yes! The free version allows limited audits, while the Professional Plan ($4.95/month) includes 50 audits per month across 10 different websites. You can also run bulk audits (up to 10 simultaneously) to analyze multiple pages efficiently. This is perfect for agencies, businesses with multiple properties, or anyone managing several websites.
How often should I run an SEO audit?
We recommend running audits weekly for active websites with frequent updates, monthly for stable sites, and immediately after any major changes (redesigns, migrations, CMS updates, etc.). Professional Plan users can set up automated audits that run on schedule and send notifications when issues are detected, ensuring you catch problems before they impact rankings.
What's the difference between free and paid plans?
The free version provides basic audits with all 43 tests. The Professional Plan ($4.95/month) adds: 50 audits/month instead of limited free audits, 10 websites vs. 1, bulk audit capability (10 at once), automated scheduled audits, 1-year audit history retention, multiple notification handlers, API access, exportable reports, AI summaries, no ads, and removable branding. It's designed for professionals who need regular monitoring and advanced features.
Does the audit tool work for any website?
Yes! Our tool works with any publicly accessible website, regardless of platform (WordPress, Shopify, custom code, etc.), hosting provider, or size. Simply enter your URL and we'll analyze it. The tool accesses your site like a search engine would, examining what's visible to crawlers and users.
Can I export my audit results?
Professional Plan users have access to 3 export features, allowing you to save and share audit results in various formats. This is perfect for creating client reports, tracking historical changes, or sharing findings with your development team. You can export the complete audit data, including scores, issues, recommendations, and performance metrics.
Is my website data private and secure?
Absolutely. We only access publicly available information that search engines can already see. We don't store sensitive data, require backend access, or install anything on your server. Audit results are private to your account (Professional Plan users can add password protection). We take privacy seriously and comply with all data protection regulations.
Will fixing audit issues guarantee higher rankings?
While we can't guarantee specific rankings (no legitimate SEO tool can), fixing audit issues removes barriers preventing your site from ranking well. Technical SEO, on-page optimization, and performance improvements are confirmed ranking factors. By addressing issues identified in your audit, you're giving your site the best possible foundation for search visibility. Rankings depend on many factors including content quality, backlinks, and competition—but technical excellence is mandatory, not optional.

Professional Plan

$4.95
per month
  • 50 audits per month
  • 10 websites
  • 43 comprehensive audit tests
  • 10 audits in bulk
  • 1 year audit retention
  • Automated scheduled audits
  • Multiple notification handlers
  • Unlimited teams
  • Password protection
  • API access
  • 3 export features
  • AI audit summaries
  • No ads
  • Removable branding
View All Plans

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Join thousands of website owners using our SEO audit tool to improve their search rankings. Start with a free audit today or upgrade to Professional for advanced features.